Question

with the help of clear and labelled diagrams describe how aneuploids are formed?

Answer 1

There are two main types of cells in your body. One type, germ cells, divide and give rise to cells with 23 chromosomes. The other type, somatic cells, give rise to cells with 46 chromosomes.

Division and allocation of chromosomes in germ cells and somatic cells.

There are many factors and proteins involved when cells divide. Sometimes factors or proteins are missing, or proteins don't function correctly. Occasionally when this happens, homologs, which are duplicated during cell division, don't separate .

                                       Aneuploidy also alters cell division and growth, and therefore fetal development, often resulting in miscarriage or severe birth defects.

When germ cells exhibit aneuploidy, they give rise to certain disorders, depending on if a chromosome is missing (monosomy) or if there is an extra chromosome (trisomy).